title: Letrozole in breast cancer.
mesh_terms: D000970:Antineoplastic Agents / Q000627:therapeutic use*; D001943:Breast Neoplasms / Q000188:drug therapy*; D005260:Female; D006801:Humans; D000077289:Letrozole; D009570:Nitriles / Q000627:therapeutic use*; D016032:Randomized Controlled Trials as Topic / Q000941:ethics* / Q000592:standards; D013629:Tamoxifen / Q000627:therapeutic use; D014230:Triazoles / Q000627:therapeutic use*
chemical_list: D000970:Antineoplastic Agents; D009570:Nitriles; D014230:Triazoles; D013629:Tamoxifen; D000077289:Letrozole